.info_div {
    margin-top: 20px;
    width: 1200px;
    height: auto;
    margin-left: auto;
    margin-right: auto;
    left: 0;
    right: 0;
}
.head_pic {
    width: auto;
    height: auto;
}
.head_img {
    width: 100px;
    height: 100px;
}